Pitman or pump-rod



(No Model.) V

J.- F. LOOMIS.

PITMAN 0R PUMP ROD.

No. 364,423. Patented June 7, 1887.

ATTORNEYS.

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T UNITED STATES PATENT OFFICE.

JOHN FAY LOOMIS, OF SHELBY, IOWA.

PITMAN OR PUMP-ROD.

SPECIFICATION forming part of Letters Patent No. 364,423, dated June '7, 1887.

Application filed January 21, 1887. Serial No. 225,031. (No model.)

To aZZ whom it may concern.-

Be it known that 1, JOHN FAY LooMIs, of Shelby, in the county of Shelby and State of Iowa, have invented a new and useful Improvement in Pitmen or Pump Beds for Windmills, of which the following is a specification. I

My invention is in the nature of an improved pitman or pump-rod for a windmill, designed to render the said rod elastic in the direction of its length by the interposition of a spring or elastic cushion in its length, which takes up excessive strain and jar and causes a shorter stroke for the pump-piston in proportion to the increased speed of the wheel, thus rendering the pump more uniform in its action.

Figure 1 is aperspcctive view of the pumprod with its interposed. spring. Fig. 2 is a side view showing the application ofa supplemental spring to the U-shaped spring.

In the drawings, A A represent the pitman or pump-rod of the windmill, the uppenportion of which is operated by the revolution of the wheel and thelower portion of which connects with the pump-piston or with mechanism actuating the pump-piston. Between these two sections of the pump-rod I interpose an elastic Ushaped. spring, l3, whose branches are formed with holes a. Through one of these holes in one of the branches of the spring the lower end of one section, A, of the pump-rod is fastened by a clevis-eoupling, O, and a screw nut, and through one of the holes in the other branch ofthe spring the upperend of the lower section of the pump-rod is fastened in a similar way. \Vhen the pump-rod sections are secured in the holes near the ends of the branches of the spring, the greatest range of springmovementis allowed between the pumprod sections, and when said pump-rod sec tions are adjusted in the holes close to the bend of the U-shaped spring the latter acts more stiflly, and-the least range of the movement'is allowed between the sections ofthe pump-rod.

D is a guide-rod arranged in offsets (I from the clevis-couplings, to preserve the alignment of the pump-rod sections.

In Fig. 2 I show means whereby I vary the tension of the U-shaped spring by means of supplemental spiral springs s s, disposed aroun d a rod, S, extending through the ends of the U-shaped spring, and upon the ends of which rod a washer and adjusting screw-nut, t, is arranged, which latter may be turned up to increase the tension to adapt the pump-rod to deeper wells requiring a longer and heavier pump-rod.

What I claim is l. A pitman or pump-rod made in two sections, combined with an interposed U-shaped spring whose ends are respectively attached to the adjacent ends of the two sections of the pitman, substantially as and for the purpose.

described.

2. A pitman or pump rod made in two sections, combined with a U-shaped spring having ends attached to the ends of the pitmansection, and a parallel guide-rod arranged to connect the pitmansections and preserve their alignment, substantially as described.

3. A reciprocating pump rod for a windmill, made in two sections, and having interposed in its length between said sections a U- shaped spring with holes a,'substantially as and for the purpose described.

4. The combination, with the sectional pitman, of the interposed U shaped spring B and supplemental springs s s, for re-enforcing the U-shaped spring.

JOHN FAY LOOMIS.

Witnesses: N. JASPER J ONES,

P. K. \VATTERS. 

